JPS6160209B2 - - Google Patents
Info
- Publication number
- JPS6160209B2 JPS6160209B2 JP51011742A JP1174276A JPS6160209B2 JP S6160209 B2 JPS6160209 B2 JP S6160209B2 JP 51011742 A JP51011742 A JP 51011742A JP 1174276 A JP1174276 A JP 1174276A JP S6160209 B2 JPS6160209 B2 JP S6160209B2
- Authority
- JP
- Japan
- Prior art keywords
- soft soil
- soil
- layer
- hardened
- hardening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
【発明の詳細な説明】
本発明は、軟弱土質層内に排水溝などの開溝を
設けるにさいし簡単に施工できる新規な施工方法
を提案するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention proposes a new construction method that allows easy construction of an open trench such as a drainage ditch in a soft soil layer.
従来排水溝を設けたりするには、開削工法によ
つて土砂の取出しが行われているが、軟弱土質層
においては掘削溝の崩壊があつたり、湧水などの
ため工事不可能となるケースがまま発生する。 Traditionally, in order to construct drainage ditches, earth and sand have been removed using open-cut construction methods, but in soft soil layers, there are cases where the excavated ditch collapses or construction becomes impossible due to spring water, etc. It still occurs.
本発明は斯かる欠点を除去せんとするものであ
つて、その特徴とするところは軟弱土質層内の軟
弱土と土質硬化剤とを撹拌して硬化処理し、該層
内に浮く一体の硬化処理浮体を形成せしめ、且つ
この浮体上方の一部に開削排土した凹状部を設け
て開溝となすにある。 The present invention aims to eliminate such drawbacks, and its feature is that the soft soil and soil hardening agent in the soft soil layer are stirred and hardened, and the hardened solids floating in the layer are cured. A treatment floating body is formed, and a recessed portion is provided in a part above the floating body by excavating and removing soil to form an open groove.
以下、本発明方法実施の一例を図面にもとづい
て説明する。 An example of implementing the method of the present invention will be described below based on the drawings.
第１図は軟弱土質層１内に開溝を設け、該開溝
内に管を埋設する例を示すものであつて、２は硬
化処理装置の撹拌羽根のみを示す。ここに撹拌羽
根２１，２oは、軟弱土質層１内の一定深さＨよ
り表層面までを硬化処理装置の移動と共に回転さ
せながら上下動させ、且つその上下動中常に土質
硬化剤（以下硬化剤という）を撹拌部分に吐出さ
せて硬化処理が行われるようになすものであり、
これに対し撹拌２２……２o-1は軟弱土質層１内
の一定範囲ｈのみを同様に硬化処理されるよう作
動せしめるものである。ここに硬化処理するに必
要な巾Ｗ，Ｈ及びｈは軟弱土の土質及び埋設する
管の大きさや用途などに応じて必要な寸法を土木
工学的に計算して決定する。しかして、軟弱土質
層１内に浮く一体の連続した縦断面形凹状の硬化
処理浮体３を形成させるようになすものであつ
て、該硬化処理が完了するとＢ図に示す如く、内
部の軟弱土４を両側に取除き、ついで管５を敷設
したのちＣ図に示す如く置換土の埋戻しを行うも
のである。 FIG. 1 shows an example in which an open groove is provided in a soft soil layer 1 and a pipe is buried in the open groove, and 2 shows only the stirring blade of the hardening treatment device. Here, the stirring blades 2 1 , 2 o are rotated and moved up and down from a certain depth H in the soft soil layer 1 to the surface layer along with the movement of the hardening treatment device, and during the up and down movement, the stirring blades 2 1 and 2 o are constantly filled with a soil hardening agent (hereinafter referred to as The hardening process is performed by discharging a hardening agent (called a hardening agent) into the stirring part.
On the other hand, the stirring 2 2 . The widths W, H, and h necessary for the hardening treatment are determined by civil engineering calculations of the necessary dimensions depending on the quality of the soft soil, the size and purpose of the buried pipe, etc. As a result, a hardened floating body 3 having a concave vertical cross-section and an integral continuous structure floating in the soft soil layer 1 is formed, and when the hardening treatment is completed, the soft soil inside is formed as shown in Figure B. 4 are removed from both sides, then pipes 5 are laid, and then backfilled with replacement soil as shown in Figure C.
本実施例に於いて管を埋設するべく内部の軟弱
土４を取除くさい、これを取巻く周囲の軟弱土は
既に硬化されているため側壁の崩壊などを生ずる
ようなことはなくなり、また湧水を生ずる恐れの
ある軟弱土に対しては予め硬化剤中に防水用薬剤
を添加しておくことにより硬化処理浮体３を不透
水体に形成させて、充分にその阻止を図ることが
できる。 In this example, when removing the soft soil 4 inside to bury the pipe, the soft soil surrounding it has already hardened, so there is no possibility of side walls collapsing, and no spring water is generated. For soft soil that is likely to cause this, by adding a waterproofing agent to the hardening agent in advance, the hardened floating body 3 can be formed into a water-impermeable body, and this can be sufficiently prevented.
上記実施例では撹拌羽根２１……２oのうち、
内部の撹拌羽根の上下動を制限して軟弱土を連続
した断面凹状に硬化処理するものについて説明し
たが、一斉に同様の上下動をさせることにより硬
化処理を行い、且つ内部の一定範囲を開削工法を
採用して排土し、管を埋設するようになしても良
い。この排土４は、再び置換土の代用として埋戻
しに再利用することができる。 In the above embodiment, among the stirring blades 2 1 ... 2 o ,
We have explained how to harden soft soil into a continuous concave cross-section by restricting the vertical movement of the internal stirring blades, but it is also possible to harden soft soil by making the same vertical movement all at once, and to excavate a certain area inside. It is also possible to use a construction method to remove the earth and bury the pipe. This waste soil 4 can be reused for backfilling as a substitute for replacement soil.
なお、上記実施例では管の埋設を例として説明
したが、排水溝の構築にそのまま適用することの
できるものである。 In addition, although the above-mentioned example was explained by burying a pipe as an example, it can be applied as it is to constructing a drainage ditch.
第２図は他の例を示すものであつて、先づＡ図
に示す如く軟弱土質層１内の特定距離間位置ｌに
おける一定巾Ｗを同じく硬化処理装置を移動させ
ることにより、撹拌羽根を回転と共に上下動せし
め、且つその撹拌部分に硬化剤を吐出させつつ連
続した硬化処理浮体６，６′を形成し、ついでＢ
図に示す如く該浮体６，６′間の軟弱土４を両側
に除去し、丸木材その他適宜必要な基礎部材７を
敷設する。しかるのちＣ図に示す如く管５を載置
し、ついで置換土の埋戻しを行つて埋設を行うも
のである。 FIG. 2 shows another example. First, as shown in FIG. While moving up and down with rotation and discharging the hardening agent into the stirring portion, continuous hardening treatment floating bodies 6, 6' are formed, and then B
As shown in the figure, the soft soil 4 between the floating bodies 6 and 6' is removed from both sides, and round timbers and other necessary foundation members 7 are laid down. Thereafter, the pipe 5 is placed as shown in Figure C, and then backfilled with replacement soil and buried.
第３図は前例に於いて硬化処理浮体６，６′
を、形成するさい、補強のために硬化処理浮体
６，６′の未硬化状態時にパイル若しくは矢板又
は配筋８，８′（以下矢板という）を打込んで強
化を図つたものであり、その他は前例と同様に実
施される。 Figure 3 shows hardened floating bodies 6, 6' in the previous example.
When forming the floating bodies 6, 6', piles, sheet piles, or reinforcements 8, 8' (hereinafter referred to as sheet piles) are driven into the hardened floating bodies 6, 6' (hereinafter referred to as sheet piles) for reinforcement, and other is carried out in the same way as before.
上記実施例においては管の埋設される両側浮体
の全体を硬化処理したものについて図示したが、
矢板の打込みを併用する場合には矢板を支持する
に必要最小限の一定範囲即ち上部、下部或は内部
などを部分的に限定して硬化処理し、他を省略す
ることができる。なお、このさい矢板の打込み深
さは必要深さを適宜設計して施工するものであつ
て、軟弱土質層１内の途中までであつても、また
支持地盤まで到達するように打込むものであつて
も良い。 In the above embodiment, the entire floating body on both sides in which the pipe is buried is hardened, but
When driving the sheet piles together, the hardening process can be carried out by partially limiting the minimum certain range necessary to support the sheet piles, ie, the upper, lower part, or inside, and the rest can be omitted. In addition, the driving depth of this sheet pile is designed and constructed according to the required depth, and even if it is halfway into the soft soil layer 1, it should not be driven so as to reach the supporting ground. It's okay if it's hot.
本例では硬化処理浮体の未硬化時に矢板を打込
むため、無騒音でその施工を可能となし、且つ補
強の外に不透水浮体の形成を容易ならしめる。ま
た、単に矢板を打込む場合に比べて滑りやネガチ
ブフリクシヨンを防止することのできるものであ
り、開溝部の土止めや根止め等にみ効果的であ
る。 In this example, since the sheet piles are driven into the hardened floating body when it is not yet hardened, construction can be performed without noise, and in addition to reinforcement, the formation of a water-impermeable floating body is facilitated. In addition, it can prevent slippage and negative friction compared to simply driving sheet piles, and is effective only for earth-holding and root-holding of open trenches.
以上、各例に於ける本発明方法の実施にさいし
硬化処理装置は図示することを省略したが、本出
願人が先に提案した特願昭48−130934号（特開昭
50−80670号）で示した如き硬化処理装置が使用
される。しかして硬化剤は撹拌羽根の回転中、そ
の回転軸の中空部を通つて同じく中空に形成した
撹拌羽根の内部から外部に向けて吐出されるよう
なさしめられるが、軟弱土が粘性土などの場合に
は撹拌中の粘性土が撹拌羽根に附着することによ
つて撹拌能力が劣化させられることがある。これ
を防止するためには硬化剤に予め砂を適量混合さ
せておくようになすと良く、非常に優れた作用効
果が発揮される。又、同時に砂を粘性土に混合す
ることは土質改良後の強度を向上させるにも有効
である。 Although illustration of the hardening treatment apparatus was omitted when carrying out the method of the present invention in each of the examples above, the present applicant has previously proposed Japanese Patent Application No. 130934/1986
50-80670) is used. Therefore, while the stirring blade is rotating, the hardening agent is discharged from the inside of the stirring blade, which is also formed hollow, to the outside through the hollow part of the rotating shaft. In some cases, the clayey soil that is being stirred may adhere to the stirring blades, thereby degrading the stirring ability. In order to prevent this, it is advisable to mix an appropriate amount of sand into the curing agent in advance, and a very excellent effect can be achieved. At the same time, mixing sand with clayey soil is also effective in improving the strength of the soil after soil improvement.
本発明方法は以上の如く実施するものであつ
て、従来は置換工法のみでしか施工できなかつた
軟弱土質層内への排水溝などの開溝を、軟弱土自
身を積極的にとりこんで活用しながら遂行できる
ようになしたもので、極めて能率的な施工となる
と共に開溝の崩壊や湧水などの懸念もないので、
その作業は極めて容易となつて工期も短縮される
優れた施工方法である。 The method of the present invention is carried out as described above, and utilizes open ditches such as drainage ditches into soft soil layers, which conventionally could only be constructed using the replacement method, by actively incorporating the soft soil itself. This allows for extremely efficient construction, and there is no concern about collapse of the open ditch or water leakage.
This is an excellent construction method that makes the work extremely easy and shortens the construction period.
添附図面は本発明方法実施の一例を示すもので
あつて、第１図Ａ，Ｂ，Ｃは軟弱土質層内を一体
の連続した縦断面形凹状浮体に硬化処理して管を
埋設する状態を示すもの、第２図Ａ，Ｂ，Ｃは軟
弱土質層内に並行した連続硬化浮体を形成して管
を埋設する状態を示すもの、第３図Ａ，Ｂ，Ｃは
前例に於いて矢板を打込んだ状態を示すものの例
である。
１……軟弱土質層、３，６……硬化処理浮体、
５……管、８……矢板。
The attached drawings show an example of carrying out the method of the present invention, and FIGS. 1A, B, and C show a state in which a pipe is buried in a soft soil layer by hardening it into a concave floating body with a continuous longitudinal section. Figures 2A, B, and C show the state in which pipes are buried by forming continuous hardened floating bodies parallel to each other in a soft soil layer, and Figures 3A, B, and C show the state in which the pipes are buried in a soft soil layer. This is an example of a state in which it has been typed. 1... Soft soil layer, 3, 6... Hardened floating body,
5...Pipe, 8...Sheet pile.
Claims (1)
して硬化処理し、該層内に浮く一体の硬化処理浮
体を形成せしめ、且つこの浮体上方の一部に開削
排土した凹状部を設けて開溝になすことを特徴と
した軟弱土質層内に開溝を設ける方法。 ２ 軟弱土質層内の軟弱土と土質硬化剤とを撹拌
して硬化処理し、該層内に浮く一体の硬化処理浮
体を形成せしめるに際し、硬化処理箇所が未硬化
の状態のときに該硬化処理箇所へ矢板を打設し、
且つ上方の一部に開削排土した凹状部を設けて開
溝になすことを特徴とした軟弱土質層内に開溝を
設ける方法。[Scope of Claims] 1. Soft soil and soil hardening agent in a soft soil layer are stirred and hardened to form an integrated hardened floating body floating within the layer, and a portion above the floating body is cut. A method for creating an open trench in a soft soil layer, which is characterized by creating an open trench by providing a concave portion of soil removed. 2. When stirring and hardening the soft soil and soil hardening agent in the soft soil layer to form an integrated hardened floating body floating within the layer, the hardening treatment is performed when the hardening treatment area is in an unhardened state. Driving sheet piles at the location,
A method for forming an open trench in a soft soil layer, characterized in that the groove is formed by providing a recessed portion in a part of the upper part by excavating and removing soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1174276A JPS5294611A (en) | 1976-02-04 | 1976-02-04 | Method of laying pipe or providing open ditch into poor soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1174276A JPS5294611A (en) | 1976-02-04 | 1976-02-04 | Method of laying pipe or providing open ditch into poor soil |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59216535A Division JPS60181426A (en) | 1984-10-15 | 1984-10-15 | Method of burying pipe in soft soil layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5294611A JPS5294611A (en) | 1977-08-09 |
| JPS6160209B2 true JPS6160209B2 (en) | 1986-12-19 |
Family
ID=11786467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1174276A Granted JPS5294611A (en) | 1976-02-04 | 1976-02-04 | Method of laying pipe or providing open ditch into poor soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5294611A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2379007A1 (en) * | 1977-01-26 | 1978-08-25 | Soletanche | Pipe laying system using mud filled trench - uses grout for connections between pipe sections after immersion, before mud hardens |
| JP6718767B2 (en) * | 2016-07-29 | 2020-07-08 | 大成建設株式会社 | Composite of soil structure and concrete structure and its construction method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577247B2 (en) * | 1972-04-07 | 1982-02-09 |
-
1976
- 1976-02-04 JP JP1174276A patent/JPS5294611A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5294611A (en) | 1977-08-09 |
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